Combined ventilator and windshield



March 31 1925.' V

W. D. MILAM COMBINED VENTILAITOR AND 'WINDSHIELD Original Fil d u y 17.1922 Patented Mar. 31, 1925.

UNITED STATES PATENT OFFICE.

WALTON DOUGLASS MILAM, OF EL PASO, TEXAS.

COMBINED VE-NTILATOR AND WINDS HIELD.

Application filed July 17, 1922, Serial No. 575,502. Renewed January 17,1925.

To all whom it may concern:

Be it known that l, l VALTON DOUGLASS MIL-AM, a citizen of the UnitedStates, residing at El Paso, in the county of El Paso and State ofTexas, have invented a new and useful Combined Ventilator and\Vindshield, of which the following is a specification.

This invention relates to a combined ventilator and windshield designedprimarily for use in the windows of buildings, trains, automobiles andsimilar structures where it is desired to thoroughly ventilate anenclosure and at the same time prevent objectionable drafts fromentering the enclosure.

Another object is to provide a structure of this character which alsoallows a person to see through the ventilator as, for example, where itis used as the windshield of an automobile.

Another object is to provide a structure of this character which issimple and durable in construction and can be manufactured at low cost.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within the scope ofwhat is claimed, changes in the precise embodiment of the inventionshown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred forms of the invention havebeen shown.

In said drawings Figure 1 is an elevation of a combined ventilator andwindshield embodying the present improvement-s, a portion being brokenaway.

Figure 2 is a longitudinal section therethrough on line 22, Figure 1.

Figure 3 is a section on line 83, Fig ure 2. I

Figure 4 is a view similar .to Figure 2 but showing a modifiedconstruction.

Referring to the figures by characters of reference 1 designates a sheetof suitable material formed with transverse angular corrugations 2 ofany desired proportions. These corrugations provide outside channels 3therebetween and formed within the walls of these channels are slits aoverhung or partly closed by outstanding lips 4 produced by striking themetal outwardly'in the formation of the slits. The lips form pocketswhich open backwardly toward the inner or closed portions of thechannels 3. Thus it will be seen that air currents moving in thedirection indicated by the arrows in Figure 2 will strike against theinnermost walls of the channels 3 and spread laterally so as to flowoutwardly from the open ends of the channels. This action of the aircurrents will set up a suction through the slits i as indicated byarrows in Figure 2 with the result that air will be withdrawn from theenclosure back of the shield and ventilator. The lips 5 prevent theout-side air currents from flowing directly through the slits and intothe enclosure. The circulation of the air currents has been clearlyillustrated by arrows in Figures 2 and 3.

Instead of providing slits in the walls of the channels as shown inFigure 2, a modified structure such as illustrated in Figure 4 may beemployed. In this form of device the sheet of material is formed withtransverse corrugations 6 and the outer or forward ridges of thecorrugations are provided with longitudinal slits 7 These slits arenarrow so that when an air current come-s against the corrugations itwill not flow through the slits but will be split by the corrugationsand flow into the channels between the corrugations and thence laterallyfrom the ends of the channels as heretofore explained.

This action will be suflicie-nt to draw air outwardly through the slits7 and properly ventilate the enclosure. By locating slits as shown inthis modified structure a person seated behind the windshield can seethrough it.

What is claimed is l. A combined ventilator and windshield comprising asheet of material formed with transverse corrugations providing outsidewind receiving channels extending transversely of the structure, saidchannels being open at their ends, and slits extending longitudinally ofthe corrugations adjacent the back portions of the wind receivingchannels.

2. A combined ventilator and windshield comprising a sheet of materialformed with transverse corrugations providing outside wind receivingchannels extending transversely of the structure, said channels beingopen at their ends, and having slits extending longitudinally of thecorrugations ad- In testimony that I claim the foregoing jacent the backportions of the Wind receivas my own, I have hereto affixed my signaingchannels, and deflecting lips integral ture in the presence of twoWitnesses.

With the structure and extending between the WVALTON DOUGLASS MILAM.Wind receiving channels, said lips diverging Vitnesses: forwardly andeach lip constituting the back THORNTON HARDIE,

Wall of one of the slits. C. H. JONES.

